DEAS 1103 : 2022 
ICS 75.100  
 
© EA C 2022                                                                                                                              First Edition 20 22  
 DRAFT EAST AFRICAN STANDARD  
Base oil — Specification   
  
 EAST AFRICAN COMMUNITY  DEAS 1103:  2022  
ii © EAC 2022  – All rights reserved  
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 DEAS 1103 : 2022  
© EAC 2022  – All rights re served  iii 
 Foreword  
Development of the East Af rican Standards has been necessit ated by the need for harmonizing requirements 
governing quality of products and services in the East African Community. It is envisaged that through 
harmonized standardization, trade barriers that are encountered when goods  and services are exchanged 
within the Community will be removed.  
The Community has established an East African Standards Committee  (EASC)  mandated to develop and 
issue East African Standards  (EAS) . The Committee is composed of representatives of the Nati onal 
Standards Bodies in Partner States, together with the representatives from the public and private sector 
organizations  in the community .  
East African Standards are developed through  Technical Committees that are representative of key 
stakeholders inc luding government, academia, cons umer groups, private sector and other interested parties. 
Draft East African Standards are circulated to stakeholders through the National Standards Bodies in the 
Partner States. The comments received are discussed and inco rporated before finalization of s tandards, in 
accordance with the Principles and procedures for development of East African Standards . 
East African Standards are subject to review, to keep pace with technological advances. Users of the East 
African Standar ds are therefore expected to ensu re that they always have the latest versions of the standards 
they are implementing .  
The committee responsible  for this document is Technical Committee EASC/TC 068, Petroleum and 
petroleum product s. 
Attention is drawn to t he possibility that some of the e lements of this document may be subject of patent 
rights. EAC shall not be held responsible for identifying any or all such patent rights.  
 FINAL DRAFT EAST AFRICAN STANDARD  DEAS 1103 : 2022  
 
© EAC 20 22 – All rights reserved  1 
 Base oil — Specification 1 Scope   
This Draft East Africa Standard specifies requirements , sampling  and test methods f or base oils composed of 
hydrocarbons and intended for use in formulating products including au tomotive and i ndustrial lubricants. This 
standard does not cover base oils containing detectable levels of esters, animal fats, vegetable oils, or oth er 
material s used  as, or blended into, lubricants . 
2 Normative references   
The following referenced docum ents referred to i n the text in such a way that some or  all of their content 
constitutes requirements of this document. For dated references, only the edition cit ed applies. For undated 
references, the latest edition of the referenced document (including a ny amendments) app lies. 
ASTM D 92, Standard test method  for flash and fire points by Cleveland open cup tester  
ASTM D 97, Standard test method for pour  point of pet roleum products  
ASTM D 130, Standard test method for corrosiveness to copper from petroleum products by copper  strip test  
ASTM D 445, Standard test  method for kinematic viscosity of transparent and opaque liquids (and calculation 
of dynamic vi scosity ) 
ASTM D 482, Standard Test Method for Ash from Petroleum Products  
ASTM D 664, Standard test metho d for acid number of petroleum products by potentiometr ic titration  
ASTM D 974, Standard test method for acid and base number by color -Indicator titrat ion 
ASTM D 1298, Standard test method for density, relative density, or API Gravity of crude petroleum an d liquid 
petroleum  products by hydrometer method  
ASTM D 1500, Standard test method for ASTM color of petroleum products (ASTM color scale)  
ASTM D 1744,  Standard test method  for determination of water in liquid petroleum products by Karl Fischer 
reagent  
ASTM D2270, Standard  Practice for Calculating Viscosity I ndex from Kinematic Viscosity at 40 and 100°C  
ASTM D 2622, Standard test method for sulfur in pe troleum products by wav elength dispersive x -ray 
fluorescence spectrometry  
ASTM D 2896, Standard Test Meth od for Base Number  of Petroleum Products by Potentiomet ric Perchloric 
Acid Titration  
ASTM D 3120, Standard test method for trace quantities of sulfur i n light liquid petroleum hydrocarbons by 
oxidative microcoulometry  
ASTM D 4052, Standard test method for density, relative density, and api gravity of liquids b y digital density 
meter  
ASTM D 4059, Standard test method for analysis of polychlorinated biphen yls in insulating liquids b y gas 
chromatography  
ASTM D 4291, Standard test method for trace ethylene glyc ol in used engine oil DEAS 1103 : 2022  
2 © EAC 2022  – All rights reserved  
 ASTM D 4294, Standard test method  for sulfur in petroleum and petroleum products by energy dispersive x -
ray fluorescence spectrom etry 
ASTM D 4530, Standard Tes t Method for Determination of Carbon Residue (Micro Method)  
ASTM D 4628, Standard Test Method  for Analysis of Barium, Calcium, Mag nesium, and Zinc in Unused 
Lubricating Oils by Atomic Absorption Spectrometry  
ASTM D 4739, Stand ard test method for base number determination by potentiometric hydrochloric acid 
titration  
ASTM D 4927, Standard test meth ods for elemental analysis of lubrica nt and additive components — Barium , 
calcium, phosphorus, sulfur, and zinc by wavelength -dispers ive x-ray fluorescence spectrosco py 
ASTM D 4929, Standard test methods for determination of organic chlor ide content in cru de oil 
ASTM D 4951, Standard test met hod for determination of additive elements in lubricating oils by inductively 
coupled plasma ato mic emission spectrometry  
ASTM D 5185, Standard test method for determination of additive elements, wear metals, and contam inants in 
used lubricating oils and d etermination of selected elements in base oils by inductively coupled plasma atomic 
emission spe ctrometry (ICP -AES)  
ASTM D 5950, Standard Test Method for Pour Point of Petroleum Products (Automatic Til t Method)  
ASTM D 6 304, Standard Test Method for Determi nation of Water in Petroleum Products, Lubricating Oils, and 
Additives by Coulometric Karl Fisch er Titration  
ASTM D 7042, Standard tes t method for dynamic viscosity and density of liquids by stabinger viscometer (and 
the calculation of kinematic viscosity)  
EPA 8120 , Chlorinated hydrocarbons by gas chromatography  
ASTM D4057 , Standard Practice for Manu al Sa mpling of Petroleum and Petroleum  Products  
ASTM D4177 , Standard Practice for Automatic Sampling of Petroleum and Petro leum Products  
3 Terms and definitions   
For the purposes of this document, the following terms and definitions apply . 
ISO and IEC m aintain terminological databases for use in standardization at the following addresses:  
ISO Online browsing platform: availa ble at http://www.iso.org/obp  
3.1 
base oil  
base stock or blen d of two or more base stocks use d to produce finished lubricants, usually  in combination 
with additives  
3.2 
base stock  
hydrocarbon lubricant component, othe r than an additive, that is produced by a sin gle manufacturer to the 
same specifications (independen t of feed source or manufacturer ’s location), and that is identified by a  unique 
formula number or product identification number, or both.  DEAS 1103 : 2022  
© EAC 2022  – All rights re served  3 
 4 Requirements  
4.1 General requirements  
Lubricating base oil shall be free from suspended matter, grit, water or any other foreign matter and impur ities 
4.2 Specific requirements  
4.2.1  Physical requirements  
Base oil shall comply with the physical requirements given i n Table 1 when tested in accordance with the test 
methods prescribed therein.  
Table 1 — Physical requirements for base oil  
S/N Physi cal property  Requirement  Test method  
i.  Appea rance  Bright and clear  Visual  
ii.  ASTM  Colour, max.  6 ASTM D1500  
iii.  Density at 15 °C ,kg/l, min.  
   To be reporte d ASTM D1298  
ASTM D4052  
iv.  Flash point, °C, min. (Cleveland open cup)  180 ASTM D92  
v.  Kinema tic viscosity at  40 °C and 100 °C, mm2/s 
(cSt)  To be reported  ASTM D445  
ASTM D7042  
vi.  Viscosity index, min.  90 ASTM D227 0  
vii.  Pour point  , °C, max.  -3 ASTM D97  
ASTM D5950  
 
4.2 Compositional requirements  
Base oil shall comply with the compositional re quirements given in Table 2 when tested in acc ordance with 
the test methods prescrib ed there in. 
Table 2 — Compositional re quirements for base oil  
S/N Property  Requirement  Test method  
i.  Micro carbon residue, %, m/m, max.  0.8 ASTM  D4530  
ii.  Sulphur , wt, %, m ax.  
 1.5 ASTM D2622  
ASTM D4294  
ASTM D3120  
 
4.3 Chemical requirements  
Base  oil shall comply with the c hemical re quirements given in Table 3 when tested in accordance with the test 
methods prescribed therein.  DEAS 1103 : 2022  
4 © EAC 2022  – All rights reserved  
 Table 3 — Chemical requirements for base oil  
S/N Property  Requirement  Test method  
i.  Acid n umber, mg KOH/g, max.  0.50 ASTM D974  
ASTM D664  
ii.  Base number, mg K OH/g, max.  1.2 ASTM D4739  
ASTM D2896  
iii.  Total chlorine, mg/kg, max.  50 ASTM D4929  
iv.  Copper corrosion 3 h at 10 0°C, max.  1 Classificat ion ASTM D130  
v.  Elemental analysis, mg/kg: - 
Mg, Na, Ba, Cu, B, Pb, Mn, Ni, Si  
Al, As, Cd, Ca, Fe, P, Zn, Cr, Sn,   
Total o f all above elements, mg/kg, max.  25 ASTM D5185  
 
vi.  Glycol, mg/kg, max.  5 ASTM D4291  
vii.  PCB (polychlorinated biphenyl) content , mg/kg, 
max.  2 ASTM D4059  
viii.  Total volatile  organ ic halogens, mg/kg, max.  5 EPA 8120  
ix.  Water, mg/kg, max.  150 ASTM D1744  
ASTM D6304  
x.  Ash, wt, %, max.  0.01 ASTM D 482  
 
5 Packaging  
Base oil shall be packaged in a suitable con tainer  that will s afeguard its quality  during  transportation and 
storage.  
6 Marking  
6.1 The follow ing information shall be clearly marked on the container, or on a label affixed to the container:  
a) name and physical address  of the manufacturer or supplier;  
b) name  of the product  as “ Base oil”  ;  
c) batch number/ident ification;  
d) net content ;  
e) date of manufacture ; 
f) description of the product  for example  SN150  
g) country of origin  
6.2 For bulk transp ortation the above infor mation shall be in the docum entation  accompan ying the product.  DEAS 1103 : 2022  
© EAC 2022  – All rights re served  5 
 7 Sampli ng 
Sampl ing of lubricating base oil shall be ca rried out in accordance with ASTM D4057  or ASTM D4177 . DEAS 1103 : 2022  
6 © EAC 2022  – All rights reserved  
 Bibliography  
KS2491: 2021 , Petroleum  and Petroleum products —Base  oil — Specification  
 DEAS 1103 : 2022    
 
© EAC 2022 – All rights reserved